Child safety seat and side collision protection mechanism thereof

ABSTRACT

A side collision protection mechanism includes a side collision protection case pivotally connected to a side region of a child safety seat and a locking element movably set in the side collision protection case and having a locking end detachably locked to the side region. The locking end is fully locked to the side region when the side collision protection case is in an extended state and subjected to a side impact force, or partially locked to the side region when the side collision protection case is in the extended state but not subjected to any side impact force. The side collision protection case can be pushed pivotally relative to the side region to switch from the extended state to a folded state and to release the locking end from its locking to the side region. A child safety seat with the above side collision protection mechanism is also disclosed.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a National Stage application of PCT/EP2021/066322,filed Jun. 16, 2021, which claims the benefit of Chinese Application No.202010571212.0, filed Jun. 19, 2020, both of which are incorporated byreference in their entirety herein.

TECHNICAL FIELD

The present disclosure relates to the field of baby products, and inparticular to a child safety seat and a side collision protectionmechanism thereof.

BACKGROUND A child safety seat is mainly used on a car to protect thesafety of a child riding in the car. Currently, the child safety seathas been widely applied. In our daily life, side collision often occursduring a car accident. To protect the child riding in the car against aside impact force during the side collision accident, various sidecollision protection mechanisms have been developed for mounting on sideregions of the child safety seats.

SUMMARY

The side collision protection mechanism according to the presentdisclosure is provided on a child safety seat for buffering a sideimpact force applied to the child safety seat during a side collisionaccident. For this purpose, the side collision protection mechanismincludes a side collision protection case and a locking element. Theside collision protection case is pivotably connected to a side regionof the child safety seat and can be switched between a folded state, inwhich the side collision protection case is flatly fitted on the sideregion, and an extended state, in which the side collision protectioncase is turned away from the side region. The side collision protectioncase is maintained in the extended state through a locking of thelocking element to the side region. The locking element is movably setin the side collision protection case and has a locking end detachablyengaged with the side region; the locking end is fully locked to theside region when the side collision protection case is in the extendedstate and subjected to a side impact force; and the locking end ispartially locked to the side region when the side collision protectioncase is in the extended state but not subjected to any side impactforce. In the latter case, the locking end can be released from itspartial locking to the side region when the side collision protectioncase is pushed to pivotally turn relative to the side region to switchfrom the extended state into the folded state.

The child safety seat according to the present disclosure includes aseat, a base and the above-mentioned side collision protectionmechanism. The seat is mounted on a top of the base; and the sidecollision protection case is pivotally connected to a side region of theseat or the base.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective structural view of a child safety seat having aside collision protection mechanism according to the present disclosurewith a side collision protection case of the side collision protectionmechanism in an extended state.

FIG. 2 is a further perspective structural view of the child safety seatof FIG. 1 viewed from another angle.

FIG. 3 is a perspective structural view of the child safety seataccording to the present disclosure with the side collision protectioncase thereof in a folded state.

FIG. 4 includes a sectional view taken along line A-A of FIG. 2 and afragmentary enlarged view thereof.

FIG. 5 is a sectional view showing the side collision protection case ofFIG. 4 is pushed to turn pivotally.

FIG. 6 is a sectional view showing a locking element of the sidecollision protection mechanism of FIG. 4 is retreated into the sidecollision protection case with a locking end of the locking elementfully locked in place when the child safety seat is subjected to a sideimpact force.

DETAILED DESCRIPTION

To facilitate understanding of the objects, characteristics and effectsof this present disclosure, a preferred embodiment together with theattached drawings for the detailed description of the present disclosureare provided. It is noted the present disclosure can be implemented orapplied in other embodiments, and many changes and modifications in thedescribed embodiment can be carried out without departing from thespirit of the disclosure, and it is also understood that the preferredembodiment is only illustrative and not intended to limit the presentdisclosure in any way.

A currently available side collision protection mechanism generallyincludes unlocking operating means, a locking device and a sidecollision protection case. The conventional side collision protectioncase is sideward extended from the side region of the child safety seatwhen it is in a use state, and is flatly fitted on the side region ofthe child safety seat when it is not in use. When the conventional sidecollision protection case is in the use state, the unlocking operatingmeans can be operated to control the unlocking of the locking device, sothat the sideward extended conventional side collision protection casecan be folded. Since the above described conventional side collisionprotection mechanism is complicated in structure, it is difficult toefficiently fold the conventional side collision protection mechanismwhen the same is not in use.

It is therefore desirable to overcome the above problems by providing animproved side collision protection mechanism having a simple structureand being easily and quickly foldable, and a child safety seat havingthe above improved side collision protection mechanism mounted thereon.

An objective of the present disclosure is to provide a side collisionprotection mechanism that has a simple structure and can be quickly andconveniently folded but can provide immediate protection to a childriding in a car during a side collision accident.

Another objective of the present disclosure is to provide a child safetyseat having a side collision protection mechanism, and the sidecollision protection mechanism has a simple structure and can be quicklyand conveniently folded when it is not in use but can provide immediateprotection to a child riding in a car during a side collision accident.

Compared to the prior art, the locking end of the present disclosure isfully locked to the side region when the side collision protection caseis in the extended state and subjected to a side impact force, such thatthe side collision protection case can stably maintain in the extendedstate and provide immediate protection to a user during a side collisionaccident to ensure a safety use thereof. On the other hand, the lockingend is only partially locked to the side region when the side collisionprotection case is in the extended state but not subjected to any sideimpact force, in this case, an operator can simply manually pivotallypush the side collision protection case relative to the side region torelease the partial locking of the locking end from the side regioncompletely without the necessity of operating any unlocking means, whicheffectively increases the speed of folding up the side collisionprotection case to facilitate convenient and quick folding procedure ofthe latter. Further, since the side collision protection mechanism doesnot include any unlocking means that needs an operator to operate, theside collision protection mechanism can have an effectively optimizedand simplified structure.

Also, compared to the prior art, since the child safety seat accordingto the present disclosure includes the above-mentioned side collisionprotection mechanism, the locking end of the side collision protectioncase in the extended state is fully locked to the side region during aside collision accident to stably maintain the side collision protectioncase in the extended state, which enables the side collision protectionmechanism to provide immediate protection to a child riding in a carduring the side collision accident and ensures the safety use of theside collision protection mechanism. And, since the locking end of theside collision protection case in the extended state is not fully lockedto the side region when there is not any side collision, the sidecollision protection case can be manually pushed pivotally relative tothe side region to release the locking end from its partial locking tothe side region completely without the need of operating any unlockingmeans, which effectively increases the speed of folding up the sidecollision protection mechanism to facilitate convenient and quickfolding procedure of the latter. Further, since the side collisionprotection mechanism of the present disclosure does not include anyunlocking means that needs an operator to operate, the side collisionprotection mechanism can have an effectively optimized and simplifiedstructure.

As shown in FIGS. 1 to 3 , a child safety seat 100 according to thepresent disclosure includes a side collision protection mechanism 10, aseat 20 and a base 30. The seat 20 is mounted on a top of the base 30.The side collision protection mechanism 10 includes a side collisionprotection case 11, which will be described in detail below, pivotallyconnected to a side region 21 of the seat 20. Preferably, but notlimited to, the side collision protection mechanism 10 is provided toeach of two side regions 21 of the seat 20, so as to provide a completedbuffering protection to a child sitting in the child safety seat 100.The side collision protection case 11 can be switched between a foldedstate, in which the side collision protection case 11 is flatly fittedon the side region 21 as shown in FIG. 3 , and an extended state, inwhich the side collision protection case is pivotally turned away fromthe side region 21 as shown in FIGS. 1 and 2 . When the child safetyseat 100 is in use, the side collision protection case 11 is pivotallyturned from the folded state into the extended state. When the childsafety seat 100 with the side collision protection case 11 in theextended state is subjected to a side impact force during a sidecollision accident, the side impact force will first act on the sidecollision protection mechanism 10 instead of the child sitting in thechild safety seat 100, and the side impact force will then beeffectively guided out through the seat 20 or the base 30 and bebuffered, providing a good protection to the child in the child safetyseat 100. When the child safety seat 100 is not in use, the sidecollision protection case 11 can be pivotally turned into the foldedstate to flatly fit on the side region 21 and reduce the space occupiedby it to facilitate convenient storage of the child safety seat 100.Depending on the actual need in use, the side collision protection case11 can also be pivotally connected to a side region 21 at the base 30,so that the side collision protection mechanism 10 is adaptable todifferent mounting environments and provides more appropriateprotection. The child safety seat 100 of the present disclosure mayadopt a currently available safety seat structure, which is notrepeatedly described herein. Of course, in addition to be applied to theabove-mentioned child safety seat 100, the side collision protectionmechanism 10 can also be applied to other types of baby and childcarriers according to actual need without being particularly limited toany specific application. The side collision protection mechanism 10 isnow described in more detail with reference to the accompanying FIGS. 1to 6 .

Please first refer to FIGS. 4 to 6 . In addition to the above-mentionedside collision protection case 11, the side collision protectionmechanism 10 further includes a locking element 12. The side collisionprotection case 11 maintains in the extended state through locking ofthe locking element 12 to the side region 21. The locking element 12 ismovably set in the side collision protection case 11 and includes alocking end 121 detachably engaged with the side region 21. When theside collision protection case 11 is in the extended state and subjectedto a side impact force, the locking end 121 is fully locked to the sideregion 21. When the side collision protection case 11 is in the extendedstate but not subjected to any side impact force, the locking end 121 ispartially locked to the side region 21. In the latter case, the sidecollision protection case 11 can be pushed to pivotally turn relative tothe side region 21 to release the locking end 121 from its partiallocking to the side region 21, such that the side collision protectioncase 11 can be switched from the extended state into the folded state.That is, the locking end 121 is fully locked to the side region 21 whenthe side collision protection case 11 is in the extended state andsubjected to a side impact force, such that the side collisionprotection case 11 is stably maintained in the extended state. The sidecollision protection mechanism 10 with the above structure ensures itssafety use because it provides immediate protection function as soon asa side collision accident occurs. Further, since the locking end 121 isonly partially locked to the side regions 21 without being fully lockedto the side region 21 when the side collision protection case 11 is inthe extended state but not subjected to any side impact force, the sidecollision protection case 11 can be manually pushed to turn pivotallyand release the locking end 121 from its partial locking to the sideregion 21 completely without the need of operating any unlocking means,which effectively increases the speed of folding the side collisionprotection mechanism 10 and makes the folding of the side collisionprotection mechanism 10 more easily and quickly. Also, the sidecollision protection mechanism 10 of the present disclosure has afurther simplified and optimized body structure because it does notinclude any unlocking means that requires operation. What is to be notedis the term “side impact force” used herein means an impact forceapplied to a lateral side of the child safety seat 100, which produces ahead-on impact on the locking element 12. Specifically, the lockingelement 12 is slidably set in the side collision protection case 11 andcan be conveniently moved to quickly lock to the side region 21 inresponse to the side impact force in a side collision accident. Morespecifically, an end of the locking element 12 farther away from thelocking end 121 forms an actuating end 122, which is exposed from theside collision protection case 11. When the child safety seat 100 issubjected to a side impact force during a side collision accident, theactuating end 122 of the locking element 12 is the first part thatcontacts with the sideward impacted car body. At this point, the lockingelement 12 is immediately axially pushed at the actuating end 122 toretreat into the side collision protection case 11, such that thelocking end 121 is fully locked to the side region 21 and the whole sidecollision protection case 11 is immediately locked to the extended statein response to the side collision to sufficiently ensure the safety usethereof.

As shown in FIGS. 4 to 6 , the locking element 12 is arranged to beslidable along a direction the same as a lengthwise extending directionof the side collision protection case 11. When the side collisionprotection mechanism 10 is subjected to a side impact force in a sidecollision accident, the side impact force forms a push force F2 acted onthe locking element 12 in the slidable direction of the locking element12, as shown in FIG. 6 . This brings the locking element 12 to retreatinto the side collision protection case 11 to quickly lock to the sideregion 21. To be able to respond to side impact forces that possiblycome from different directions against the locking element 12, theactuating end 122 of the locking element 12 has a substantially camberedouter end surface. Of course, depending on the actual need in use, theouter end surface of the actuating end 122 can be otherwise a flat endsurface or an irregularly curved surface without particular limitationthereto. Preferably, the side collision protection case 11 has a contactsurface 112 for flatly contacting with the side region 21, and an inwardextended concave push surface 113 located opposite to the contactsurface 112. When the side collision protection case 11 is in the foldedstate, the contact surface 112 is flatly fitted on the side region 21,so that the child safety seat 100 is more compact in structure. Topivotally turn the extended side collision protection case 11 into thefolded state, an operator may press his or her palm on the concave pushsurface 113 to facilitate easy turning of the side collision protectioncase 11.

Please refer to FIGS. 1, 2, 4 and 6 . The side collision protectionmechanism 10 of the present disclosure further includes a fixing member13 fixedly mounted to the child safety seat 100. The fixing member 13includes a locking recess 131 for detachably engaging with the lockingend 121, and the locking of the locking end 121 to the side region 21 isrealized through the engagement of the locking end 121 with the lockingrecess 131. Since the fixing member is an independent device and thelocking end 121 is locked to the side region 21 through the engagementof it with the locking recess 131 of the fixing member 13, the fixingmember 13 provides the function of preventing the side region 21 fromany adverse influence on the structure thereof. Preferably, the lockingend 121 only extends into the locking recess 131 by a depth of 3 mm whenthe side collision protection case 11 is in the extended state and notsubjected to any side impact force, such that the locking end 121 iseasily detachable from the locking recess 131. It is understood thepresent disclosure is not particularly limited to the above condition.Depending on the actual need in use, the locking end 121 can beconfigured to extend deeper into the locking recess 131, such as 5 mm;or to extend less deep into the locking recess 131, such as 2 mmSpecifically, the locking element 12 is in alignment with the lockingrecess 131 when the side collision protection case 11 is in the extendedstate, so that the locking element 12 can be quickly aligned with andengaged with the locking recess 131 when the side collision protectioncase 11 is in the extended state. For example, the locking recess 131can be, but not limited to, a slot; and the locking element 12 can be,but not limited to, a plate or a shaft. More specifically, the lockingend 121 is provided at its tip with a beveled structure 1211, which isin alignment with an inner peripheral wall around an opening of thelocking recess 131 when the side collision protection case 11 is in theextended state and not subjected to a side impact force. When the sidecollision protection case 11 is being pivotally turned, the beveledstructure 1211 of the locking end 121 is slidably pressed against theinner peripheral wall around the opening of the locking recess 131,allowing the locking end 121 to smoothly release from the partiallocking to the locking recess 131 and accordingly, to quickly unlock thelocking element 12. The beveled structure 1211 at the tip of the lockingend 121 is preferably, but not limited to, 1.5 mm in length. Dependingon the actual need in use, the beveled structure 1211 may be otherwise arounded edge structure formed at the tip of the locking end 121.

Please refer to FIGS. 4 to 6 . When the side collision protection case11 is in the extended state and subjected to a side impact force, aninterference fit between the actuating end 122 and the side collisionprotection case 11 occurs to block the locking element 12 fromcompletely retreating into the side collision protection case 11 andlosing its normal function. Specifically, the side collision protectioncase 11 internally defines a slide passage 111, in which the lockingelement 12 slides. The locking element 12 is located in the slidepassage 111 without the risk of shaking in the side collision protectioncase 11 to ensure stable and smooth sliding of the locking element 12 inthe side collision protection case 11. More specifically, the slidepassage 111 includes a first passage section 1111 and a second passagesection 1112, which are arranged in a stepped manner. The second passagesection 1112 has a bore size larger than that of the first passagesection 1111. The second passage section 1112 extends through the sidecollision protection case 11 with the actuating end 122 of the lockingelement 12 set in the second passage section 1112. When the sidecollision protection case 11 is subjected to a side impact force, theactuating end 122 is pressed against an inner wall surface of the secondpassage section 1112. That is, during a side collision accident, theactuating end 122 is blocked by the inner wall surface of the secondpassage section 1112 from completely retreating into the side collisionprotection case 11 to lose its normal function.

As shown in FIGS. 4 to 6 , the side collision protection mechanism 10 ofthe present disclosure further includes a locating assembly 14 mountedon the side collision protection case 11 and coupled to the lockingelement 12. When the side collision protection case 11 is in theextended state and not subjected to any side impact force, the locatingassembly 14 constantly holds the locking element 12 in place in the sidecollision protection case 11, so that the locking end 121 constantlymaintain the partial locking to the side region 21. Therefore, when theside collision protection case 11 is in the extended state and notsubjected to any side impact force, the locking element 12 is constantlypartially locked to the locking recess 131, which ensures the lockingelement 12 can be brought by the side collision protection case 11 toquickly release from the engagement with the locking recess 131 and theside collision protection case 11 can be changed from the extended stateinto the folded state each time the side collision protection case 11 ispivotally pushed to turn pivotally. Specifically, the locating assembly14 has the tendency of driving the locking element 12 to extend out ofthe side collision protection case 11 when the locking end 121 is fullylocked to the side region 21. That is, each time after a side collision,the locating assembly 14 functions to restore or reset the lockingelement 12 to the position of extending out of the side collisionprotection case 11 for convenient use next time. More specifically, thelocating assembly 14 includes a mounting section 141 and an elasticsection 142 located at an end of the mounting section 141. The elasticsection 142 is elastically arranged relative to the mounting section141, the mounting section 141 is mounted on the side collisionprotection case 11, and the elastic section 142 is mounted on thelocking element 12 in an interference-fit manner. The locating assembly14 is simple in structure and advantageous for easy mounting. Dependingon the actual need in use, the locating assembly 14 can be otherwise aconventionally known spring to similarly realize the locating and theresetting of the locking element 12. Preferably, but not limited to, themounting section 141 is snap fitted in the side collision protectioncase 11, such that the locating assembly 14 is firmly mounted in theside collision protection case 11 and can be conveniently mountedthereto or dismounted therefrom. To facilitate easy mounting of theelastic section 142 on the locking element 12 with an interference fitformed between them, the locking element 12 is provided with aconnecting bore 123 and the elastic section 142 is elastically pressedagainst an inner wall surface of the connecting bore 123. However, thepresent disclosure is not particularly limited thereto. Depending on theactual need in use, the elastic section 142 may be otherwise directlyinstalled on the locking element 12 to similarly realize the locatingand resetting of the locking element 12. For example, the locatingassembly 14 may otherwise include two elastic sections 142 and be anelastic element arranged like a letter “m”. Alternatively, depending onthe actual need in use, the locating assembly 14 may be otherwise letterN-shaped or wave-shaped without being particularly limited thereto. Toprevent the locking element 12 from completely moving out of the sidecollision protection case 11, the side collision protection case 11 isinternally provided with a locating shaft 114 inserted in and extendedthrough the connecting bore 123.

The working principle of the child safety seat 100 of the presentdisclosure is hereby explained with reference to FIGS. 1 to 6 . When itis desired to fold up the side collision protection case 11, an operatorsimply pushes the side collision protection case 11 in a directionindicated by the arrow FI in FIG. 4 . Since the side collisionprotection case 11 is initially in the extended state and the lockingend 121 of the locking element 12 is only partially engaged with thelocking recess 131, the side collision protection case 11 under the pushin the direction FI will turn in the direction indicated by the arrow Bas shown in FIG. 5 and brings the locking element 12 to turn along withit. The beveled structure 1211 of the locking end 121 pressing againstthe inner peripheral wall of the opening of the locking recess 131forces the locking element 12 to extend outward, bringing the lockingend 121 to release from the partial engagement with the locking recess131. After being pivotally turned, the side collision protection case 11in the extended state as shown in FIG. 2 is therefore switched into thefolded state, as shown in FIG. 3 .

On the other hand, when it is desired to pull out the side collisionprotection case 11 for use, an operator simply turns the side collisionprotection case 11 from the folded state into the extended state. Whenthe side collision protection case 11 is being turned, the locatingassembly 14 is deformed and has a tendency of constantly driving thelocking element 12 toward the fixing member 13 for the locking end 121to constantly press against the fixing member 13. When the sidecollision protection case 11 has been switched into the extended state,the locking element 12 is aligned with the locking recess 131 and nolonger blocked by the fixing member 13, and the locating assembly 14 iselastically restored from the deformation to push the locking end 121 toextend into the locking recess 131. Since the locking element 12 islocated in place by the locating assembly 14, the locking end 121 isconstantly partially engaged with the locking recess 131, which keepsthe side collision protection case 11 in the extended state to buffer aside impact force applied to the child safety seat 100.

When the child safety seat 100 is subjected to a side impact force inthe direction indicated by the arrow F2 as shown in FIG. 6 , theactuating end 122 of the locking element 12 protruded from the sidecollision protection case 11 is the first part that receives the sideimpact force. As a result, the locking element 12 is pushed into theside collision protection case 11 and the locking end 121 is brought tocompletely extend into the locking recess 131 to lock and maintain theside collision protection case 11 in the extended state. Since the sidecollision protection case 11 functions to buffer the side impact forceapplied to the child safety seat 100 by the car body during a sidecollision accident, it ensures the safety use of the child safety seat100.

It is to be noted that the push of the side collision protection case 11as mentioned above means the application of a push force to the sidecollision protection case 11 to pivotally turn the same; and the pushforce acts in a direction perpendicular to a direction in which the sidecollision protection case 11 is lengthwise extended.

Compared to the currently available technical means, the side collisionprotection mechanism 10 of the present disclosure includes a sidecollision protection case 11 and a locking element 12. The sidecollision protection case 11 maintains in an extended state throughlocking of the locking element 12 to a side region 21 of a child safetyseat 100. The locking element 12 is slidably set in the side collisionprotection case 11 and includes a locking end 121 that is detachablyengaged with the side region 21. When the side collision protection case11 is in the extended state and subjected to a side impact force, thelocking end 121 is fully locked to the side region 21. On the otherhand, when the side collision protection case 11 is in the extendedstate but not subjected to any side impact force, the locking end 121 ispartially locked to the side region 21. In the latter case, when theside collision protection case 11 is pushed to pivotally turn relativeto the side region 21, the locking end 121 is brought by the turningside collision protection case 11 to release from the partial locking tothe side region 21, which ensures the side collision protection case 11to be switched from the extended state into a folded state. Since thelocking end 121 is fully locked to the side region 21 when the sidecollision protection case 11 is in the extended state and subjected to aside impact force, the side collision protection case 11 can be stablykept in the extended state. This means the side collision protectionmechanism 10 can quickly provide its buffer effect as soon as a sidecollision occurs to ensure the safety use thereof. On the other hand,since the locking end 121 is only partially locked to the side region 21when the side collision protection case 11 is in the extended state butnot subjected to any side impact force, the side collision protectioncase 11 can be manually pushed to turn pivotally and bring the lockingend 121 to release from the partial locking to the side regions 21completely without the need of operating any unlocking means. Thiseffectively increases the speed of folding the side collision protectionmechanism 10, making the folding of the side collision protectionmechanism 10 more easily and quickly. Further, since the side collisionprotection mechanism 10 of the present disclosure does not includes anyunlocking means that needs an operator to operate, the side collisionprotection mechanism 10 can have an effectively optimized and simplifiedstructure.

It can be understood the child safety seat 100 provided with the sidecollision

1. A side collision protection mechanism for buffering a side impactforce applied to a child safety seat during a side collision accident,comprising: a side collision protection case and a locking element; theside collision protection case being pivotally turnably connected to aside region of a child safety seat to be switched between a foldedstate, in which the side collision protection case is flatly fitted onthe side region, and an extended state, in which the side collisionprotection case is turned away from the side region; the side collisionprotection case being maintained in the extended state through a lockingof the locking element to the side region; the locking element beingmovably set in the side collision protection case and having a lockingend detachably engaged with the side region; the locking end being fullylocked to the side region when the side collision protection case is inthe extended state and subjected to a side impact force; the locking endbeing partially locked to the side region when the side collisionprotection case is in the extended state but not subjected to any sideimpact force; and the locking end being brought to release from thepartial locking to the side region when the side collision protectioncase in the extended state and not subjected to any side impact force ispushed to pivotally turn relative to the side region to switch from theextended state into the folded state.
 2. The side collision protectionmechanism according to claim 1, wherein the locking element is slidablyset in the side collision protection case.
 3. The side collisionprotection mechanism according to claim 1, wherein an end of the lockingelement far away from the locking end is an actuating end, and that theactuating end is exposed from the side collision protection case.
 4. Theside collision protection mechanism according to claim 3, wherein theactuating end has a substantially cambered outer end surface.
 5. Theside collision protection mechanism according to claim 1, furthercomprising a fixing member fixedly mounted to the child safety seat; thefixing member including a locking recess for detachably engaging withthe locking end; and the locking of the locking end to the side regionbeing realized through the engagement of the locking end with thelocking recess.
 6. The side collision protection mechanism according toclaim 5, wherein the locking element is in alignment with the lockingrecess when the side collision protection case in the extended state. 7.The side collision protection mechanism according to claim 5, whereinthe locking end has a tip provided with a beveled structure, and thebeveled structure being m alignment with an inner peripheral wall aroundan opening of the locking recess when the side collision protection caseis in the extended state and not subjected to a side impact force. 8.The side collision protection mechanism according to claim 5, whereinthe locking recess is a slot.
 9. The side collision protection mechanismaccording to claim 3, wherein an interference fit between the actuatingend and the side collision protection case occurs when the sidecollision protection case is in the extended state and subjected to aside impact force.
 10. The side collision protection mechanism accordingto claim 3, wherein the side collision protection case internallydefines a slide passage, and the locking element being slidably set inthe slide passage.
 11. The side collision protection mechanism accordingto claim 10, wherein the slide passage includes a first passage sectionand a second passage section, which are arranged in a stepped manner,such that the second passage section has a bore size larger than that ofthe first passage section; and the second passage section extendingthrough the side collision protection case with the actuating end set inthe second passage section.
 12. The side collision protection mechanismaccording to claim 1, wherein the locking element is arranged to beslidable along a direction the same as a lengthwise extending directionof the side collision protection case.
 13. The side collision protectionmechanism according to claim 1, further comprising a locating assemblymounted on the side collision protection case and connected to thelocking element; the locating assembly constantly holding the lockingelement m place in the side collision protection case when the sidecollision protection case is in the extended state and not subjected toany side impact force, such that the locking end is constantlymaintained in its partial locking to the side region.
 14. The sidecollision protection mechanism according to claim 13, wherein thelocating assembly has a tendency of driving the locking element toextend out of the side collision protection case when the locking end isfully locked to the side region.
 15. The side collision protectionmechanism according to claim 13, wherein the locating assembly includesa mounting section and an elastic section located at an end of themounting section; the elastic section being elastically arrangedrelative to the mounting section, the mounting section being mounted onthe side collision protection case, and the elastic section beingmounted on the locking element in an interference-fit manner.
 16. Theside collision protection mechanism according to claim 15, wherein thelocking element is provided with a connecting bore, and the elasticsection being pressed against an inner wall surface of the connectingbore.
 17. The side collision protection mechanism according to claim 16,wherein the side collision protection case is internally provided with alocating shaft, and the locating shaft being inserted in and extendedthrough the connecting bore.
 18. The side collision protection mechanismaccording to claim 13, wherein the locating assembly is an elasticelement arranged like a letter “m”.
 19. The side collision protectionmechanism according to claim 1, wherein the side collision protectioncase has a contact surface for flatly contacting with the side region,and an inward extended concave push surface located opposite to thecontact surface.
 20. A child safety seat, comprising: a seat, a base anda side collision protection mechanism; the side collision protectionmechanism being one according to claim 1; the seat being mounted on atop of the base; and a side collision protection case of the sidecollision protection mechanism being pivotally connected to a sideregion of the seat or the base.